Vortex 523ZR-48 CAT5 Aluminum Rear Sprocket 520 Pitch 48-Tooth Red

The Vortex 523ZR-48 is a CAT5 aluminum rear sprocket featuring a 520 pitch and 48 teeth, finished in a striking red anodized color with contrasting silver machined highlights. Engineered for street and track riders who demand precision and performance, this sprocket is a direct upgrade over heavy OEM steel units.

Key Features:

• 520 pitch chain compatibility — 48-tooth rear sprocket
• Red (ZR) anodized finish applied before CNC machining, producing vivid color with bright silver accent cuts
• Lightweight CAT5 aluminum construction reduces rotating mass for improved acceleration response
• 100% CNC manufactured in the USA to exacting tolerances for perfect concentricity
• Specially formulated aluminum alloy per Vortex specifications for optimal strength-to-weight ratio
• Patented Vortex tooth profile reduces chain wear and extends drivetrain life
• Mud grooves and optimized tooth geometry help shed debris and reduce friction

The Vortex 523ZR-48 is available in single-tooth increments, allowing riders to fine-tune their gear ratio for the ideal balance of acceleration and top-end performance. Pair with a compatible 520-pitch front sprocket and chain for a complete drivetrain upgrade.